TWI556716B - Heat exchange unit, heat exchange device and closed electrical apparatus with heat exchange device - Google Patents

Description

Heat exchange unit, heat exchange device and closed electrical equipment using heat exchange device

The present invention relates to a heat exchange device and a heat exchange unit therefor.

With the development of electronic products towards high performance, and the heating temperature of electronic products is getting higher and higher, heat dissipation has become one of the important topics of electronic products. In closed electrical equipment, heat exchange devices are often used to dissipate the interior of the enclosed electrical equipment.

1A is an exploded perspective view of a conventional heat exchange device 1, and FIG. 1B is a side cross-sectional view of the heat exchange device 1 shown in FIG. 1A. Referring to FIGS. 1A and 1B, the heat exchange device 1 is formed by the inner circulation fan 11, the outer circulation fan 12, and the heat exchange unit 13 being disposed in the casing 14, and covered by the lid 15. The inner circulation fan 11 and the outer circulation fan 12 are respectively disposed on the upper and lower sides of the heat exchange unit 13. Thus, when the circulation fan 11 is rotated within the hermetic electrical equipment in the direction of hot air is introduced into the interior of the housing 14 I _1, an outer circulation fan 12 will be rotated in the direction of O ₂ cold outside air into the casing 14. After the internal hot air and the external cold air enter the heat exchange unit 13 in the casing 14 in different directions I ₁ and O ₂ , heat exchange is performed by the passage wall surface of the heat exchange unit 13 . The hot air introduced by the direction I ₁ is converted into cold air by the heat exchange action of the heat exchange unit 13, and then returned to the inside of the sealed electrical equipment in the direction I ₂ ; the external cold air introduced by the direction O ₂ passes through the heat exchange unit The heat exchange effect of 13 is converted into hot air, which is then led to the outside in the direction O ₁ . By the heat exchange of the heat exchange unit 13, heat dissipation can be generated for the sealed electrical equipment.

However, when the volume of the sealed electrical equipment is small, the volume of the heat exchange device 1 must also be reduced, causing the volume of the heat exchange unit 13 to be reduced to affect the heat dissipation effect. Moreover, since the air inlet and outlet of the casing 14 and the air inlet and outlet of the heat exchange unit 13 are at a nearly right angle, the inner circulation fan 11 and the outer circulation fan 12 can only use a centrifugal fan, and the centrifugal fan has a lower air volume. There are disadvantages of loud noise.

In view of the above problems, it is an object of the present invention to provide a heat exchange device and a heat exchange unit therefor. The heat exchange device has a casing, an inner circulation axial fan, an outer circulation axial fan, and a heat exchange unit. An inner circulation axial fan is disposed in the housing. An outer circulation axial fan is disposed in the housing. The heat exchange unit is disposed in the housing and includes: a first vertical outer surface and a second vertical outer surface, wherein the first vertical outer surface is parallel to the second vertical outer surface; a first oblique outer surface, Connecting the first vertical outer surface and the second vertical outer surface; a second oblique outer surface parallel to the first oblique outer surface, connecting the first vertical outer surface and the second vertical outer surface; and a a first air inlet and a second air inlet, the inner air inlet fan is correspondingly disposed on the first air inlet and the outer circulation axial fan is correspondingly disposed on the second air inlet, wherein the first air inlet is disposed at The first oblique outward surface, the second air inlet is disposed on the second oblique outward surface, and the second air inlet corresponds to the first air inlet in a vertical direction.

Since at least one tuyere of the heat exchange unit of the present invention has a slope, a large-sized inner circulation fan or an outer circulation fan can be selected. The inner/outer circulation fan can be used with a larger axial fan.

The sealed electric appliance of the present invention uses the above-described heat exchange device to discharge waste heat inside the electric appliance via the heat exchange device without convection with air outside the electric device.

Hereinafter, the sealed electrical equipment, the heat exchange device, and the heat exchange unit according to the first embodiment of the present invention will be described with reference to the related drawings, wherein the same elements will be described with the same reference numerals.

Fig. 2 is a side cross-sectional view showing the heat exchange device 2 of the first embodiment of the present invention applied to the sealed electrical equipment a. The closed electrical equipment a can be a servo or other large closed electrical appliance. The sealed electrical device a includes an electronic component b and a casing c. The electronic component b is disposed in the casing c and generates heat when it is operated. The heat exchange device 2 of the first embodiment of the present invention includes an inner circulation fan 21, an outer circulation fan 22, a heat exchange unit 23, and a casing 24. The heat exchange device 2 exchanges the waste heat generated when the electronic component b operates, to the outside of the casing c, and does not convect the sealed electrical equipment a with the outside air. The heat exchange device 2 is at least partially located in the casing c or attached to the casing c, and may be partially disposed in the casing c and partially exposed to the casing c. In this embodiment, the heat exchange device 2 is completely disposed in the casing c, but is not limited thereto.

3A, 3B, and 3C are respectively a front view, a side view, and a rear view of the heat exchange device 2 of the first embodiment of the present invention. Referring to FIG. 2 together, the housing 24 has an inner circulation air inlet 241 and an inner circulation air outlet 242 facing the inside of the casing c. The housing 24 has an outer circulation air inlet 244 and an outer circulation air outlet 243 in a direction outward of the casing c. The heat exchange unit 23 is mounted in the housing 24 and cooperates with the housing 24 to form an inner circulation passage (first passage) (I ₁ to I ₂ ) and an outer circulation passage (second passage) (O ₁ to O _{2 )} ). The inner circulation fan 21 and the outer circulation fan 22 of the heat exchange device 2 are positioned on different sides of the heat exchange unit 23. Hot air inside the hermetic electrical equipment a inner via circulation fan 21 circulating air inlet 241 from the inside in the direction I ₁ into the heat exchange means in heat exchange unit 23 performs heat exchange, the air after cooling the direction I ₂ of The inner circulation air outlet 242 exits the heat exchange device 2 and returns to the closed electrical device a. The cold air outside the sealed electrical equipment a is heat-exchanged by the outer circulation fan 22 from the outer circulation air inlet 244 into the heat exchange unit 23 in the heat exchange device 2 in the O ₂ direction, and the heat-absorbing air is circulated from the outer air outlet 243. The O ₁ direction leaves the heat exchange device 2 and is emitted to the outside.

As shown in FIG. 3B, the volume of the heat exchange device 2 needs to correspond to the volume of the above-mentioned sealed electrical device a, so the thickness D _{1 is} limited by the space that the closed electrical device a can provide, but to maintain a certain heat dissipation power, the inner circulation The fan 21 needs to be of a larger diameter. In order not to be limited to the thickness D ₁ , the inner circulation air inlet 241 is a slope having a width D ₂ greater than the thickness D ₁ . Also, in order to make the outer circulation fan 22 select a larger diameter, the outer circulation air inlet 244 is also a slope having a width D ₃ greater than the thickness D ₁ . The inner circulation fan 21 and the outer circulation fan 22 shown in FIG. 3A and FIG. 3C are preferably axial fans, but are not limited thereto.

In Figure 2, the inner loop is I ₁ to I ₂ and the outer loop is O ₂ to O ₁ . In practical applications, the position of the circulating fan, the blade configuration or the direction of rotation may be changed such that the inner loop is I ₂ to I ₁ or the outer loop is O ₁ to O ₂ . Changing the position of the fan, the direction of rotation, or changing the direction of the airflow does not depart from the spirit of the present invention.

4A and 4B are schematic views of different perspectives of the heat exchange unit 23 of the heat exchange device 2 of the first embodiment of the present invention. The heat exchange unit 23 includes a first vertical outer surface S1, a second vertical outer surface S2, a first oblique outer surface S3, and a second oblique outer surface S4. The first vertical outer surface S1 is parallel to the second vertical outer surface S2. The first oblique outer surface S3 connects the first vertical outer surface S1 and the second vertical outer surface S2. The second oblique outer surface S4 connects the first vertical outer surface S1 and the second vertical outer surface S2. The second oblique outward surface S4 is parallel to the first oblique outward surface S3. Referring to FIG. 3B together, the heat exchange unit 23 is substantially made of a metal casing, the thickness d _{1 of which} corresponds to the thickness D _{1 of the} casing, and the width d ₂ of the plane formed by the inner circulation inlet 231 corresponds to the width of the inlet 241. D ₂ is the first oblique outward surface S3, the width d ₃ of the plane formed by the air inlet 234 corresponds to the width D _{3 of the} casing air inlet 244 and is the second oblique outward surface S4, the length of the heat exchange unit 23 Is L. The cross-sectional area of the airflow flowing through the heat exchange unit 23 and performing heat exchange is d ₁ * L, the area of the inner circulation air inlet is d ₂ * L, and the area of the outer circulation air inlet is d ₃ * L. Since the width d _{2 of the} air inlet 231 is larger than the thickness d _{1 of the} heat exchange unit 23 and the width d _{3 of the} air inlet 234 is larger than the thickness d _{1 of the} heat exchange unit 23, the cross-sectional area ratio of the air inlet area to the air flow is greater than 1. The area of the air inlet and the air outlet of the heat exchange unit 23 is larger than the cross-sectional area of the heat exchange unit to improve the efficiency of airflow exchange.

Fig. 5 is a side cross-sectional view showing the heat exchange device 3 of the second embodiment of the present invention applied to the sealed electrical equipment a1. The sealed electrical device a1 includes an electronic component b and a casing c. The heat exchange device 3 is located inside the casing c and includes an inner circulation fan 31, an outer circulation fan 32, a heat exchange unit 33, and a casing 34. 2, the inner circulation fan 31 and the outer circulation fan 32 of the heat exchange device 3 shown in FIG. 5 are located on the same side of the heat exchange unit 33, and the inner circulation fan 31 is attached to the casing 34 and located. In the space formed by the casing c.

6A, 6B, and 6C are respectively a front view, a side view, and a rear view of the heat exchange device 3 of the second embodiment of the present invention. Referring to FIG. 5 together, the housing 34 has an inner circulation air inlet 341 and an inner circulation air outlet 342 in a direction toward the inside of the casing c. The housing 24 has an outer circulation air inlet 344 and an outer circulation air outlet 343 in a direction outward of the casing c. The heat exchange unit 33 is mounted in the housing 34 and cooperates with the housing 34 to form an inner circulation passage and an outer circulation passage. Hot air inside the hermetic electrical equipment a1 circulation fan inside by 31 cycles the air inlet 341 from the inside in the direction I ₁ into the heat exchange device 3 the heat exchanger unit 33 performs heat exchange, the air after cooling the direction I ₂ of The inner circulation air outlet 342 exits the heat exchange device 3 and returns to the closed electrical device a. The cold air outside the sealed electrical equipment a1 is heat-exchanged through the external circulation air inlet 344 into the heat exchange unit 33 in the heat exchange device 3 in the O ₂ direction, and the heat-absorbing air is separated from the heat by the outer circulation air outlet 243 in the O ₁ direction. The switching device 3 is distributed to the outside world.

6B, the volume of the heat exchange device 3 corresponding to the need of the enclosed volume of the electrical equipment a1, the thickness D ₁ is limited by the space enclosed a1 electrical equipment can provide, however, to maintain constant power dissipation, the outer loop The fan 32 needs to be of a larger diameter. In order not to be limited to the thickness D ₁ , the outer circulation air outlet 343 is a sloped surface having a width D ₂ greater than the thickness D ₁ for accommodating the outer circulation fan 32.

In FIG. 5, the inner loop is I ₁ to I ₂ and the outer loop is O ₂ to O ₁ . In practical applications, the blade configuration or direction of rotation of the circulating fan can be changed such that the inner loop is I ₂ to I ₁ or the outer loop is O ₁ to O ₂ . Changing the position of the fan, the direction of rotation, or changing the direction of the airflow does not depart from the spirit of the present invention.

7A and 7B are schematic views of different perspectives of the heat exchange unit 33 of the heat exchange device 3 according to the second embodiment of the present invention. Referring to FIG. 6B together, the heat exchange unit 33 is substantially made of a metal casing having a thickness d ₁ corresponding to the casing thickness D ₁ . The width d ₂ of the plane formed by the outer circulation air outlet 333 of the heat exchange unit 33 corresponds to the width D ₂ of the outer circulation air outlet 343 of the heat exchange unit 33 and is a slope to increase the area of the air outlet. Furthermore, in order to increase the area of the air outlet surface, the heat exchange unit 33 is provided with an air inlet 334a at a side edge of the corresponding air inlet 344 outside the corresponding casing 34, and an air inlet 334b is provided at a lower edge of the corresponding air inlet 344. The air inlet 334a and the air inlet 334b are located on different planes. Therefore, the air inlet surface area formed by the air inlets 334a and 334b is larger than the cross-sectional area of the air flow in the heat exchange unit 23, and the efficiency of airflow exchange can be improved.

The heat exchange units 23 and 33 shown in FIGS. 4A and 4B and FIGS. 7A and 7B are formed by stacking a plurality of inner circulation gap layers and a plurality of outer circulation gap layers. That is, the passage formed by the inner circulation air inlet 231 and the inner circulation air outlet 232 of the heat exchange unit 23 and the outer circulation air inlet 234 and the outer circulation air outlet 233 are staggered and non-conducting; the heat exchange unit 33 is circulated therein. The passage formed by the tuyere 331 and the inner circulation air outlet 332 and the outer circulation air inlets 334a, 334b and the outer circulation air outlet 333 are staggered and non-conducting. The physical structure between the first channel (I ₁ to I ₂ ) and the second channel (O ₁ to O ₂ ) is a heat sink. Each channel is separated by a heat sink and the heat sink can be aluminum, copper or other material with a high thermal conductivity. The direction of the airflow when the heat exchange units 23 and 33 are actually applied depends on the airflow direction generated by the correspondingly used fan, and is not limited to the above-described embodiment, as long as the inner and outer cycles do not generate air exchange.

In summary, according to the heat exchange device and the heat exchange unit thereof of the present invention, the inner circulation and the outer circulation do not generate air exchange and the area formed by at least one inlet/outlet opening is larger than the cross-sectional area of the gas exchange, and thus can be the same The heat dissipation performance can effectively reduce the volume of the heat exchange device. Furthermore, at least one of the inlet/outlet ports of the heat exchange unit has a sloped surface, and the area thereof is not reduced by the volume of the heat exchange unit. Therefore, a larger size fan can be used to maintain the heat dissipation efficiency, or the same heat dissipation efficiency can be achieved. Under the condition, the volume required for heat dissipation of the heat exchange device can be reduced.

The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the invention are intended to be included in the scope of the appended claims.

1, 2, 3‧‧‧ heat exchange devices

11, 21, 31‧‧ ‧ internal circulation fan

12, 22, 32‧‧‧ external circulation fan

13, 23, 33‧ ‧ heat exchange unit

14, 24, 34‧‧‧ shell

15‧‧‧ cover

I ₁ , I ₂ ‧‧‧ inner circulation direction

O ₁ , O ₂ ‧‧‧ external circulation direction

231, 331, 241, 341 ‧ ‧ internal circulation air inlet

224, 332, 242, 342‧‧ ‧ inner circulation outlet

233, 333, 243, 343 ‧ ‧ outer circulation outlet

234, 334a, 334b, 244, 344‧‧‧ external circulation air inlet

a, a1‧‧‧ Closed electrical equipment

b‧‧‧Electronic device

c‧‧‧Closed case

D ₁ , d ₁ ‧ ‧ width

D ₂ , d ₂ , D ₃ , d ₃ ‧ ‧ thickness

L‧‧‧ length

I ₁ to I ₂ ‧‧‧ first channel

O ₁ to O ₂ ‧‧‧second channel

The physical structure between the first channel (I ₁ to I ₂ ) and the second channel (O ₁ to O ₂ ) is a heat sink

1A is a schematic exploded view of a conventional heat exchange device; FIG. 1B is a side cross-sectional view of the heat exchange device shown in FIG. 1A; FIG. 2 is a side view of a heat exchange device according to a first embodiment of the present invention applied to a sealed electrical device 3A, 3B, and 3C are front, side, and rear views, respectively, of the heat exchange device according to the first embodiment of the present invention; and Figs. 4A and 4B are heat exchanges applied to the first embodiment of the present invention, respectively. FIG. 5 is a side cross-sectional view of a sealed electrical apparatus to which the heat exchange apparatus of the second embodiment of the present invention is applied; FIGS. 6A, 6B, and 6C are respectively a second embodiment of the present invention; Front, side and rear views of the heat exchange device; and Figs. 7A and 7B are schematic views respectively showing different views of the heat exchange unit of the heat exchange device of the second embodiment of the present invention.

O ₁ , O ₂ ‧‧‧ external circulation direction

233‧‧‧External circulation outlet

234‧‧‧Outer circulation inlet

d ₁ ‧‧‧Width

d ₂ , d ₃ ‧‧‧ thickness

L‧‧‧ length

Claims (6)

A heat exchange unit comprising: a first vertical outer surface and a second vertical outer surface, wherein the first vertical outer surface is parallel to the second vertical outer surface; a first oblique outer surface connecting the first a vertical outer surface and the second vertical outer surface; a first air inlet and a first air outlet; a first passage between the first air inlet and the first air outlet; a circulating axial fan, corresponding The first air inlet is disposed on the first oblique outer surface, such that the area of the first air inlet is larger than the cross-sectional area of the first channel, wherein the first air outlet is The tuyere is disposed on the first vertical outer surface; a second air inlet and a second air outlet; a second passage between the second air inlet and the second air outlet; and a third air outlet The third air outlet is electrically connected to the first channel and is located on a different plane from the first air outlet, wherein the first channel and the second channel are staggered and do not conduct each other, wherein the first channel At least one scattered between the second channel Sheet interval. A heat exchange device comprising: a casing; An inner circulation axial fan disposed in the housing; and a heat exchange unit disposed in the housing, comprising: a first vertical outer surface and a second vertical outer surface, wherein the first vertical outer surface is parallel And a second oblique outer surface; a first oblique outer surface connecting the first vertical outer surface and the second vertical outer surface; and a second oblique outer surface parallel to the first oblique outer surface The first vertical outer surface and the second vertical outer surface; and a first air inlet and a second air inlet, the first air inlet is disposed on the first oblique outer surface and corresponds to the housing, wherein the The inner circulation axial fan is correspondingly disposed on the first air inlet, wherein the second air inlet is disposed on the second oblique outer surface and corresponds to the casing, and the second air inlet corresponds to the first inlet in the vertical direction. tuyere. A heat exchange device includes: a casing; a circulating axial fan disposed in the casing; and a heat exchange unit disposed in the casing, comprising: a first vertical outer surface and a second vertical outer surface The first vertical outer surface is parallel to the second vertical outer surface; a first oblique outer surface connecting the first vertical outer surface and the second vertical outer surface; and a second oblique outer surface, parallel Connecting the first vertical outer surface and the second vertical outer surface to the first oblique outer surface; and a first air inlet and a second air inlet, the first air inlet is provided The first oblique outer surface is corresponding to the first housing, wherein the circulating axial fan is correspondingly disposed on the first air inlet, wherein the second air inlet is disposed on the second oblique outer surface and is corresponding to the shell The second air inlet corresponds to the first air inlet in the vertical direction. A heat exchange device comprising: a casing; an inner circulation axial fan disposed in the casing; an outer circulation axial fan disposed in the casing; a heat exchange unit disposed in the casing, comprising: a first vertical outer surface and a second vertical outer surface, wherein the first vertical outer surface is parallel to the second vertical outer surface; a first oblique outer surface connecting the first vertical outer surface and the second a vertical outer surface; a second oblique outer surface parallel to the first oblique outer surface, connecting the first vertical outer surface and the second vertical outer surface; and a first air inlet and a second air inlet The first air inlet fan is disposed on the first air inlet and the outer air circulation fan is disposed on the second air inlet, wherein the first air inlet is disposed on the first oblique outer surface, the second The air inlet is disposed on the second oblique outward surface, and the second air inlet corresponds to the first air inlet in a vertical direction. The heat exchange device of claim 3, wherein the two air passages formed by the first air inlet and the second air inlet are respectively arranged in a staggered manner and are not electrically connected to each other. The heat exchange device of claim 3, wherein the two channels are separated by a fin.